Inventories (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Oct. 31, 2014
Inventories
Raw materials	$ 53,920		$ 64,853
Work-in-process	9,347		8,371
Finished goods	159,587		165,799
Deferred cost of goods sold	70,244		75,763
Inventories before provision	293,098		314,786
Provision for excess and obsolescence	(51,980)		(60,126)
Total inventories	241,118		254,660
Provisions	$ 5,787	$ 5,439